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  1. BVP/HRV Finger Sensor for Physiocom GP-4 , GP-8 & GP-12 - High-Grade Clip Type
    Blood Volume Pulse (BVP) Finger Sensor for GP-4 , GP-8 and GP-12 biofeedback devices from Physiocom Designs (formerly J&J Engineering). Can be used for Heart Rate Variability (HRV) training Learn More
    $70.00
  2. SE35 EDG Hook and Loop Fastener Finger Sensors - 4 pack
    8mm snap style Silver/Silver Chloride pellet embedded into a hook and loop fastener band. Learn More
  3. Respiration Sensor Belt for GP8 - GP4 - Magnetic
    Physiocom Magnetic Respiration Sensor Belt for the GP series of biofeedback devices. Learn More
    $110.00
  4. BVP/HRV Finger Sensor for Physiocom GP-4 , GP-8 & GP-12
    Blood Volume Pulse (BVP) Finger Sensor for GP-4 , GP-8 and GP-12 biofeedback devices from Physiocom Designs (formerly J&J Engineering). Can be used for Heart Rate Variability (HRV) training Learn More
    $30.00
  5. Single Red 40 inch Snap Lead for GSR/SR (GP4 & GP8 ONLY)
    Single Red 40 inch Snap Lead for GSR/SR (GP4 & GP8 ONLY) Learn More
    $16.00
  6. Neurofield Power Supply for X3000 or Q20
    Neurofield power supply (one needed for each box. (The Q20 can also be placed on battery). Learn More
    $375.00
  7. Temperature Sensor for GP-4 , GP-8 and GP-12
    Temperature Sensor for GP-4 , GP-8 and GP-12 biofeedback devices from Physiocom Designs (formerly J&J Engineering). Learn More
    $50.00
  8. J&J Input Extension Cable
    Input extender for the J&J C2+ 12 channel and 6 channel systems. Learn More
    $40.00
  9. -56%
    Ground Lead for J+J I330C-2 18 inch
    Ground lead for J&J Engineer biofeedback system. Part# GL-2 Learn More
    was $22.50 Special Price $9.99
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